Error Handling of bad Urls

DonnaghMcMahon · ‎08-31-2016

Hi Guys,

I am trying to detect errors when adding layers to a map. I am sending a url to a webservice to get layer info, I'm intentionally firing out an incorrect url so that the response returns a 500 error. is there any way i can catch the response from the webservice and trigger an error when this response is recieved?

firstLayer = new esri.layers.ArcGISDynamicMapServiceLayer(lincorrectUrl);

Thanks,

Don

RobertScheitlin__GISP · ‎08-31-2016

Don,

Here is a sample that shows error handling:

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
    <title>Simple Map</title>
    <link rel="stylesheet" href="https://js.arcgis.com/3.17/esri/css/esri.css">
    <style>
      html, body, #map {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
    <script src="https://js.arcgis.com/3.17/"></script>
    <script>
      var map;

      require(["esri/map", "esri/layers/ArcGISDynamicMapServiceLayer", "dojo/domReady!"], function(Map, ArcGISDynamicMapServiceLayer) {
        map = new Map("map", {
          basemap: "topo",  //For full list of pre-defined basemaps, navigate to http://arcg.is/1JVo6Wd
          center: [-122.45, 37.75], // longitude, latitude
          zoom: 13
        });
        var incorrectUrl = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Louisville2/LOJIC_LandRecords_Louisville/..."
        var firstLayer = new ArcGISDynamicMapServiceLayer(incorrectUrl);
        firstLayer.on('error', function(error){
          console.info(error);
        });
      });
    </script>
  </head>

  <body>
    <div id="map"></div>
  </body>
</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

View solution in original post

AdrianWelsh · ‎08-31-2016

Hi Donnagh,

It helps if you mention what programming language you are dealing with and really helps when you place your post in a "Space" that indicates your topic (like https://community.esri.com/community/developers?sr=search&searchId=9ae26d84-1fff-4933-a74b-413038205...‌ but hopefully more specific than that, like https://community.esri.com/community/developers/web-developers/arcgis-api-for-javascript?sr=search&s...). The Community Help space is for help with the GeoNet and general topics.

RobertScheitlin__GISP · ‎08-31-2016

Don,

Here is a sample that shows error handling:

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
    <title>Simple Map</title>
    <link rel="stylesheet" href="https://js.arcgis.com/3.17/esri/css/esri.css">
    <style>
      html, body, #map {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
    <script src="https://js.arcgis.com/3.17/"></script>
    <script>
      var map;

      require(["esri/map", "esri/layers/ArcGISDynamicMapServiceLayer", "dojo/domReady!"], function(Map, ArcGISDynamicMapServiceLayer) {
        map = new Map("map", {
          basemap: "topo",  //For full list of pre-defined basemaps, navigate to http://arcg.is/1JVo6Wd
          center: [-122.45, 37.75], // longitude, latitude
          zoom: 13
        });
        var incorrectUrl = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Louisville2/LOJIC_LandRecords_Louisville/..."
        var firstLayer = new ArcGISDynamicMapServiceLayer(incorrectUrl);
        firstLayer.on('error', function(error){
          console.info(error);
        });
      });
    </script>
  </head>

  <body>
    <div id="map"></div>
  </body>
</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

DonnaghMcMahon · ‎08-31-2016

Hi Robert,

This is exactly what I was looking for, I struggled to find examples in the documentation, apologies for the lack of original info.

Thanks,

Donnagh

RobertScheitlin__GISP · ‎08-31-2016

Donnagh,

Don't forget to mark this question as answered by clicking on the "Correct Answer" link on the reply that answered your question.